Attachment for potato planting machines



Sept. 8, 1936. T. E. WALKER ATTACHMENT FOR POTATO PLANTING MACHINES Filed Nov. 15, 1954 4 Sheets-Sheet 1 Sept. 8, 1936. T WALKER 2,053,410

ATTACHMENT FOR POTATO PLANTING MACHINES Filed Nov. 15, 1934 4 Sheets-Sheet 2 M1 N a U w 1 g. :E in 5 Q N a 55 m I m 25 E P 1936- T. E. WALKER 2,053,410

ATTACHMENT FOR POTATO PLANTING MACHINES 4 Sheets-Sheet 5 Filed NOV. 15, 1954 Sept. 8, 1936.. T. E. WALKER ATTACHMENT FOR POTATO PLANTING MACHINES Filed Nov. 15, 1934 4 Sheets-Sheet 4 WIIIIIIJ I S N M I N 0 Patented Sept. 8, 1936 UNITED STATES ATTACHMENT FOR POTATO PLANTING ,MACHINES Thomas E. Walker, South Tilley,

I New Brunswick, Canada Application November 1 5, 1934,. Serial No. 753,195

8 Claims.

This invention relates toattachments for pctato planting machines.

The main object of the invention is to provide an apparatus that-will carry out the tuber unit method of planting potatoes by which method the seedpieces of the potatoes are planted in rows, equal spacesseparating the seed pieces of each potato and relatively longer spaces separating the seed pieces of successive potatoes from those of the preceding potato. V A further object of the invention is toprovide an apparatus which .by a minor change inthe driving mechanism may be adapted to plant potatoes in the usual, manner with equal spaces sep-' arating all the seed pieces. r A further object of the invention. is to provide an. apparatus that will carryout theplanting op- V eration entirely mechanically from the time that the potatoes are placed upon the cutting mechanism up to the time that they are delivered to the furrow. A further object of the inventionis to provide an apparatus that with minor changes in structure may be attached to any conventional type of potato planting machine. I

*A still further object of the invention is to provide a structure which is light and simple in arrangement yet which will carry out the function of planting potatoes automatically with a high degree of accuracy. r With these and other objectsin view the invention consists essentially of a bed plate, an auxiliary frame mountable on the main frame of a potato planting machine, the auxiliary frame carrying a rotary cutting apparatus adapted 'to successively sever a number of whole potatoes into seed pieces; an automatic plunger to force the potatoes down upon the blades of the cutting apparatus, a series of seed chutes to receive the seed pieces gravitating from the cutting apparatus, a sliding valve shutting off the mouths of the seed chutes to retain the seed pieces and to release them at timed intervals into a wheel which regulates the distribution of the seed pieces to the planting drill; suitably located driving connectionsbeneath the main frame of the planting machine adapted to actuate the various units in timed relation. I

Referring to the drawings:- Figure 1 is a side elevation of the complete ap paratus mounted on a potato planting machine, the storage hoppers and one of the ground wheels being partially cut away, the remaining ground wheel being removed. 7

Figure 2 is a planview of the whole apparatus and of the potato machine upon which it is mounted.

Figure 3' is a rear elevation of the apparatusshowing particularly the component parts of the drive mechanism.

Figure 4 is a detailed side elevation of the mechanism for tripping the sliding valve, looking 7 in the direction of the arrow in Figure 3.

Figure 5 is a plan view of the sliding valve, the dotted lines showing the position of the seed in chutes above the valve. Figure 6 is a plan view of the seed distribution wheel showing also the perforated disc through which the seed pieces gravitate to the drill.

, Figure '7 is a plan'view of the rotary cutting apparatus showing the seed chutes disposed beneath one setof crossed cutting blades.

Figure 8 is an enlarged sectional view on the line 8-8 of Figure '7.

Figure 9 is an enlarged section on the line 99 of Figure 3 showing the cutting apparatus; seed chutes, sliding valve, seed distribution wheel and special disc wheel which actuates the plunger and cutting mechanisms.

Figure 10 is a side elevation of the mechanism operating the cutting unit, and

Figure 11 is an enlarged section on the line lI-ll of Figure 10.

Referring to the drawings, A represents the main frame of the potato planting machine made up of beams l0 extending from front to rear andcarried on a main axle l2 supported by ground wheels I3, suitable brackets [4 being provided to journal the axle. Mounted upon the beams In to the rear of the wheels I3 is a substantially circular bed plate l5 surrounded by an annular upwardly extending flange l6. Also mounted on the frame A is a storage hopper II, the main portion of which is disposed in front of the planting apparatus, there being rearward extensions to each side of the latter. A fertilizer container 18 is also provided.

'1}. seat l9 located towards the front of the machine is provided for the driver of the horses and another seat 20 disposed towards the rear of the bed plate I5 for the operator of the planting mechanism. Extending upwardly from the front and rear of the bed plate l5 and secured thereto by nuts 2|, are pairs of parallel upright posts 22 and 23, each pair spaced apart and linked together at its upper extremity by cross bars 24 and 25 respectively.

From the middle of each of the cross bars 24 and 25, extend uprights 26 and 21, horizontal cross bar 28 being supported by the upper extremities of the latter; an additional horizontal cross bar 29 extending between these uprights at a point slightly above the cross bars 24 and 25.

Cutting mechanism eraliy disposed series of cutting units or crossed blades 33, each unit having atithe point of inter section of the blades, an upright brad 34 adaptedl to receive the whole potato and to retain it ready for the cutting operation which is performedby the downward movement of the plunger C. framework is bordered on itsou-ter side by mean-- nular rim 35 which retains the ends of the radialblades 33 in position and gives stability toth'e wholestructure. The complete; unit Bis adapt ed to rotate freely by means of the hub 32 mounted on the bearing ring 3|; i 1

The hub 32'is provided towards thB IOWGI'. part of its outer periphery with a series: of ratchet teeth 36, a tooth opposite each'of" the units 332- The unit Bis rotated by means ofa horizontalratchet arm 37, engaging the teeth 36- with a suitablypositi'oned pall 38. ;The arm- 37- sli'dable within a bearing-39 attached to cheer the 'posts 22, is connected by a link to a bell crank 4i fulcrumed on a-bracket 42' extendi'ng outwardly from the post 22' below the bearing 39.; The vertical portion of the bellcrank M is urged inward-1 y by a spring 43; and receives atthe inner end of its horizontal portion an upward thrust by 'a' shaft 44 The shaft 44 extends downwardly 'to-beneath the-main fram'eA and is provided at its lower extremity with a foot 45 adapted to be raised by the upward movement of a roller 54 ten the special disc'wh-eel I 43, having a driven connectionwith the main axle, which will bedescribed later in detail:

The upward movement of the shaft 44 causes a. substantially horizontal movement of the I lever arm 31- thereby causing a pull through'the pawl- 38 on the teeth i androtatingthe feeder mechanism-B. In this manner each of the units 33- of the feeder mechanism is successively broughtbeneath the plunger mechanism "(3' and directly abovethe seed chutes D, being halted in this position by the actionof a vertical pin 46 located just beneath" the hub 32 and bearing uponits under surface. The pin' lfi is urged upwardly by a springand as the feeder mechanism'rotates t thepin ifislides around the under surface of the hub 32' which-is provided with a series of shallow depressions 48,- one opposite each of thecutti'ng units. Thus, as the pin 46' reaches a depression 48 it will be forced into it by the spring 41 and will thus halt the feeder unit'as each cutting unit comes beneath the plunger; are just sufficiently deep to halt the cutting apparatus when it is rotating freely. When a strong pull of the arm 3? is exerted, however, the pin 46-will be caused to jump out of the depression 48,

thus allowing the unit to-advance. 1

' Pldrtyefmechanism The plunger mechanism C is made up of" a vertically oscillating shaft 49"slidably mounted in bearings 50 and 5'! disposed midway between the ends of. the cross bars 23 and 29 respectively. On the lower end of the shaft 43 isa plunger foot '52 including a collar 53 slidable vertically to a limits 5 ed'degree on the shaft 49', and downwardly extend- The depressions 48 r ing fingers 54 adapted upon downward movement of the shaft 49, to force the whole potato resting upon the brad 34 down upon the blades 33 of the cutting unit. v Just above the foot 52 are horizontal brackets 55 extending outwardly from the shaft 49. By means of bolts 56 and bearings 51, leaf springs 58 are held pressed downwardly on thecollar 53. I

As the shaft 49 is depressed and the foot 52 comes into contactwith a potato, the first action is. amomentary upward movement of the foot 52 upon the shaft 49 against the action of the springs 58.. When,'however, the potato has been completely severed and the plunger has nearly com- -pleted its downward stroke, the springs 58 force 'the. foot. 52'" down slightly further between the knives 33, thus dislodging any loose portions of potatowhi'ch may have adhered to the knives after the preliminary downward stroke of the plunger.

Extending outwardly from the shaft 49 is an operating arm 59: connecting theishait'id with a vertical rod so which extends downwards tobeneaththe frame A, where it isl'provided. with a foot 6l adaptedi-to be depressed by the movement of the'roller Mlon thespecialidisdwheel 40..

The-upper endofi thev rod 60 is'.attachedto.a tension spring 6-2 heldby a rod63 slidablewithm a" housing 54 provided at thezouter endof a sub:- stantially L-shaped extension GSi of. the upright post 26. The rod'63 includes transverse apere tures through which a pin 66 may be insertedto beai upon the upper extremityo'f. the housing 64, thus supporting the rod 63 andith'e spring 62 which urges-the rod 60 and the connected. rod 49 man upward direction;- Adjustment of.:the tension on the spring 62' may be'accompli'shed. by placing the" pin 66- in different apertures-in the rod-63. V i

To lessen the jar occasioned by therapid; upe ward movement ofth'e shafts- 49 and, after the foot 6| has been released by the roller 141 a shock" absorber mechanism is provided; On the crossbar 28; at each side ofthebearing '5iL-are collars 5 F to which are attached the inturned ends of a substantially loop-like upright bracket 68; The inwardly sloping" sides ofthis bracket form a housing for resiliently attached buffers GQ sIoping=inwardly toward their upper ends and held within thebra eket 68 by adjustable bolts H3, against the action of compression springs H mounted upon these bolts. On the end of the plunger shaft 49 is a frustro-conical "tip-'12 which is adapted-to slide up between the buffer members SQ'a-gainst the action of 'the springs '10. It will-thus be seen that the sharp upward movement of the shaft 49; occasioned by the spring i2, will be -halted gradl'ciall y as the tip [2 slides up betweenthe two members 69- and as the pressure upon it increases in consequence.

Theoperation "of the plunger isas followsz- Uponrotation of the wheel I40 downfrom the main "axle, the downward movement of the roller 14f depresses the foot' GI causing a downward movement of theshaftfill andth e connected shaft '49: thus the foot 52 is caused to descend upon a potato resting, upon one of the cutting units33 which, aspreviously described, hasbeen rotated and brought to restdirectly beneath the plunger mechanism; The foot 52 is so shaped thatit forces thewhol'e potato resting upon the brad 34 downbetween the knives 33; consequently severing itinto four pieces." Y V 1 Once the roller has completely rolled over the foot 6], the spring. 62 causes' a rapid upward movement of the shaft'tn and consequently of the shaft 49. The shock absorber mechanism gradually halts therapid upward movement of the shaft 49 and lessens anyresulting jar.

Seed. chutes Directly beneath the" crossed blades 33 of the.

by brackets I4 and I respectively, joining each pair of posts. The apparatus D consists of four chutes I6, their upper ends fallingdirectly beneath and conforming to the size and shape of the units 33. The chutes I6 are adapted to receive the seed pieces from'the cutting mechanism as they are severed by the downward movement of the plunger. The chutes spread outwardly towards their lower ends where they are shut off by a horizontally operable valve plate 'I'I so that when the cut seed gravitates from each respective cutting unit 33, a separate seed piece falls into each of the chutes-I6 and is thus conveyed to the plate 'I'I where it is retained until this plate is opened, as will now be described.

Value mechanism The valve plate I? is substantially square and provided with openings I8, one at each side and at its rear and with slots I9 adapted in the open position to fit against the posts 23. In closed position plate I1 is adapted to shut 01f the openings at the mouths of the seed chutes I6 and thereby retain the seed pieces gravitating from the cutting mechanism and in open position the openings I6 are adapted to register with two of the seed chutes I6 while the front end of the plate is adapted to clear the remaining seed chutes, thereby leaving their mouths open allowing the seed pieces to fall down into the seed distributing wheel. V

The plate I? is urged rearwardly towards the open position by tension spring 85 attached to its rear end and at the other end to a strut 86 extending upwardly and outwardly from the flange I6. The upper end of the strut 86 is connected to the apex of a substantially V-shaped bracket 8? extending outwardly from the posts 23. The plate TI is riveted to a horizontal arm 89 slidable in brackets BI and 82. extending between the posts 22 and 23 respectively. A'vertical roller 89 centrally disposed of the-bracket BI is slidable in a slot 83 of the arm 89 to prevent the latters lateral movement. a 7

' The valve plate TI is held in closed position against the action of the spring 85by means of a catch 88 on the upper side of the arm 89, this catch being held by one end of a lever-like pawl 89 pivotally mounted at 99. -The outer end of the pawl 89 is urged upwardly by a tension spring 9I extending from a bracket 92 on the post 23 and consequently the inner end of the pawl is normally held down and in engagement with the catch 88. Depression of the outer end of the pawl 89 will release the catch 88 allowing plate 11 to be drawn into the open position. I 7

At the outer end of the pawl 89 there is pivotally connected a vertical operating rod 93 extending upwardly adjacent to the post 21. 'At a point midway between the cross bars. 28 and 29 4 spring I96, thus allowing for any excess movement. The trigger member 96 is depressed by the downward movement ofv an arm 9! extending outwardly from the plunger shaft 49, just below its junction with the arm 59, the arm 91. being horizontally urged towards the trigger'member by means of adjustable spring 98 extending between the brackets 99 and I90 also connected to the plunger shaft 49.

Below the trigger member the post 2i is provided with a vertical shoe I9I adapted to force the arm 9'! outwardfrom the trigger member against thezaction of spring 98. It will thus beseen that the downward movement of the plunger shaft 49 causes a depression of the arm 91 and consequently of the trigger member 96, but as soon asarin 91 reaches a certain point it will be forced outwardly by the shoe I9I and'will clear the'trigger member 96 thus releasing it and depressing thepawl 89. v

. The valve plate TI, after having been released by disengaging the pawl 89 from the catch 88, is urged to the open position by the spring 85. The valve is subsequently moved into the closed position again by an inner movement of the lower end of a lever I92 working against a roller I93 rotatably mounted within a bracket I94 at the The lever" I92 is fula pivotally connected foot IIl'I having therein a slot I98 in which is slidable a connection I99 from the plunger shaft 49. Midway between point I96 and the shoe I91 the horizontal portion of the bell-crank I95 is urged upwardly by a tension spring H9 connected at its'upper end to a bracket III extending downwardly from the collar 61 on the cross bar 28. a V

The downward movement of the plunger shaft causes the foot I91 to pivot around the connection IIl'I' while the bolt I99 slides along the slot I98 allowing for a certain amount of lost motion before the horizontal arm of bell-crank I95 is depressed. The depression of this horizontal arm causes an arcuate outward movement of its lower 7 end which forces the upper end of the lever I92 in an outward direction and forces its lower end sequently the valve plate I! is drawn into the open position by spring 85, thus releasing into the distributing wheel, the four seed pieces restmg upon vit. Meanwhile, the special pivotal connection of the foot I9! on the bell-crank I95 is allowing for lost motion as the bolt I99 slid-es along the slot I98. -As soon as the trigger 96 is released by the action of the shoe I97 the lost motion on the bell-crank is completed and its horizontal arm is depressed thus causing inward movement of the lower end of the lever I92 and I forcing the plate 11 into the closed position ready to'receive' the seed pieces as they are forced down on the cutting mechanism by the plunger C.

7 Seed wheel F Directly beneath the plate I? is a horizontally rotatinggdistributing wheelF. This wheel is mountedon the: shaft. I I'Zjournalledinzawbeartng I-I3: disposed. centrally andv extending upwardly from the bed plate I55. The wheeltEismadecup; of a. hub I. I4- secured to. the shaft i I2';andi.outwa:rdly

extending curved spokes. Iati connectingztha lrub I I4 with an annulartsnppurting.framelzlrii'zarrangement of the hub, spokes andilcollam: forms four seed pockets. having: as a base' a plate II6 mounted above the bed plate I5;. directl y beneath the seed wheel F, just allowing sufficient clearance for free rotation of the latter; Therpl'ate Iz-IrSE has a single aperture II'I: whichis disposed at; the head of a chute H8 leadingto theplanting'drill;

It will thus be seen that seed'pieces; they gravitate from the valve. plate IT; cometo rest within the pockets-of the: seed. wheel and upon the plate II6. Upon. rotatiorrofthe-seed wheel, however, the spokes [I5 will'sweep HIE-5511C- cessive seed pieces into the aperture II'I', whence they willgravitate to the planting The drive The various units of the machine receive their drive from a sprocket gear 9- carried on the main axle I2 close'to oneofthe brackets: I41. In suitable brackets I26 and I-2I-',,extending:down'- wardly from the frame A, isrjournalledi a stub shaft I22 carrying a large sprocketgear I23Eand also a smaller sprocket gear. I-24-,.the:latte1r being aligned with the gear H9, at sprocket chain. I25 connecting them. l

A chain I26 connectsthe gear I23 with a small-2'- ergear I2'I on a longshaft I218. having bearings rearwardly of and parallel to the. stub shaft; I22 in suitable brackets I29 and I3Il.

The shaft I28 carries a centrally disposed-bevel gear I3I meshing with a bevel gear I32at-the lower end of the shaft I I2 providing; theedriv'e'for the seed distributing wheel F; 1

On the opposite end of the shaft I28: to; the gear IE1 is an identical gear I33 c'onnectedshy'a chain I34 with a sprocket gear I35 on'a stub shaft I33 in axial alignment with the-shaft I22 and journalled in suitable brackets-I31 and: I318; The gear I35 corresponds in size/with the-gear; I123:

inwardly or" the gear I35 the shaft I36 carries a specially constructed disc wheel. I38 made-up of spaced apart circular discs MI!- andsprovidedawith an eccentrically positioned roller I4-I extending between the two discs. This roller is: adapted, upon rotation, to alternately raise thev foot: operating the cutting mechanism. and to depress the foot operating the plunger mechanism.

By adjusting the size. oigears, I33 and I35 the drive is so arranged that the roller I M makes one complete. revolution for each lJ/ revolutions of, the shaft III2 and consequently of the seed wheel F. In this manner. the seed. wheelv E. rotates five pockets for. each descent of vthephinger, the feeder mechanism being caused to advance one unit inthe same length oftime. The valve plate 11, receiving its drive directly, from. the plunger, is caused to open at'the commencement of each descent of the plunger shaft, through the operating mechanism already described. As the plunger is depressed" further, the valve is closed again just before the cuttingoperation takes place and the seed pieces gravitate down the seed chute onto the plate H. In this manner four additional seed pieces are deIi-veredfrom the valve plate I? to. the seed wheel F 'When this wheel has successively delivered i-tspreceding four seed pieces to the drill and has advanced one empty pocket.

As the machine is advancing: alongrithe ground timethese operations are taking place,

the' seed delivered to. the furrow in regular spaced. relatimi until: the. empty. pocket in the wheel is reached, atwhich point no seed piece is delivered to the drill and, consequently, a space is-left between thei-seedpieces of. each potato and thcseoizthe sncceedingpotato. In this manner theitubenunit method of planting is carried out.

To enable this apparatus to. plant potatoes in the ordinary'manner', that is,. with equal spaces between'all the seed pieces,it is only necessary to replace the. gear I35: by a gear of the same size as'the. gear I33. In this manner the disc wheel I139;,.instead of rotating slower will be caused to rotate atrthe same speed as the shaft I I2 and the seed-wheel E: The. cutting operation will then take place faster and additional seed'will be delivered't'o-the seed wheel by the valve mechanism, iustas soon as the four preceding seeds have been delivered. to: thedrill and Without time for the seed distributing wheel to advance one extra pocketgvhich it does when carrying out the tuber methodof planting. a

Method; of operation At the commencement of the planting operation, the operator occupying the seat 20 takes wholepotatoesiromthe storage hopper I1 and plaees-them-upon the eight brads 34 so that they cutting-mechanism is completely loaded. As the driver on the seat I9 causes the machine to advance, the plunger mechanism is caused to descend upon. a potato resting above one of the cutting; units 33., forcingit down upon the cross kn-iveszandpaus-ingit to be severed into four seed p1e2es:

The four seedpieces then gravitate down the chutes- 'I-Bvonte the closed valve plate TI. The plungeris then'ctuickl-y raised. by the action of the. spring 62, the roller: MI having at this point released the foot 6|.

Afterthe upward movement of the plunger another: potato isibroughtinto position for severingas the feeder mechanism is advanced one unit bytheactiorrof the-roller I4I upon the foot 45,

ashas' been-described in. connection with the cuttinamechanism.

Therplunger is' then ready to: be depressed once again. As. the shaft 49 moves downwardly, it firstrel'eases the valve plate I!- which is moved into openposition' by the spring 85. In this manner thefour-seed pieces lying upon the plate gravitate; intothe seed wheel.

The further downward movement of the plunger moves the valve plate 11 into closed position throughthe lever I02 and is thus ready to re ceive the next four seed pieces from the cutting mechanism. As the plunger has already started onits downward movement, only a short space elapsesbetween the time the seed is delivered from. the. valve plate IT- to the seed Wheel until the time that four additional seed pieces are resting upon the plate 'I I. Assoon as the four seed pieces have been delivered from the valve plate 'II. to the seed wheel F, the latter rotates, the spokes II5 sweeping each successive seed piece through the aperture. III down therchute II-8 intothe drill, the mechanism being timed so that the wheel advances one empty pocket before theiour additional pieces are released iromthe valve plate:

The operations asset out above are repeated continuously as long asthe operator keeps feedinvention Without departing from the spirit thereof or the scope of the claims, and therefore the exact forms shown are to be taken as illustrative only and not in a limiting sense, and it is desired that only such limitations shall be placed thereon as are disclosed in the prior art or are set forth in the accompanying claims.

What I claim as my invention is:

1. An attachment for potato planting machines comprising in combination means for cutting into seed pieces a plurality of potatoes, plunger means for forcing a potato down upon said cutting means, a horizontal sliding valve for retaining the seed pieces gravitating from said cutting means, revolving means for distributing the seed pieces to a planting drill, driven means for alternately actuating said plunger and said cutting means, actuating means for said valve operated by the plunger for regulating the supply of seed pieces to said distributing means and means rotating said distributing means in synchronism with the other parts of the attachment,

2. In an attachment for potato planting machines including a rotary cutting apparatus and a plunger, seed conveying chutes beneath said cutting apparatus, a horizontal sliding valve adapted to close the mouths of said chutes, spring means urging said valve into. the open position, a latch retaining said valve in the closed position against the action of said spring means, means actuated by the plunger for releasing said latch and means also actuated by the plunger for subsequently closing said valve.

3. An apparatus for planting potatoes with spaces separating the seed pieces of one potato from the seed pieces of the other potatoes comprising a supporting plate having an aperture therein, a seed distributing wheel including pockets and rotatable directly above said plate, a horizontal sliding valve above said wheel, a rotary cutting apparatus including a framework of crossed blades, seed chutes disposed beneath said framework and above said valve, a plunger disposed above said framework, rotary means for alternately advancing the cutting apparatus and depressing the plunger, means associated with said plunger for alternately opening and closing said valve, and additional means for rotating said distributing wheel.

4. An attachment for potato planting machines comprising in combination, a cutting apparatus and a revolving distributing wheel having pockets, a sliding valve regulating the supply of seed pieces from said cutting apparatus to said wheel, means actuating said apparatus valve and wheel whereby at least one blank pocket in said wheel always separates successive supplies of seed from said valve.

5. In a potato planting machine, the combination of a potato cutting apparatus, a horizontal sliding valve beneath said cutting apparatus, said valve adapted when in closed position to receive the seed pieces gravitating from said cutting apparatus, spring means urging said valve towards the open position, a latch retaining said valve in the closed position, means having a positive driven connection with the plunger for releasing said latch, and means also driven by the plunger for subsequently returning said valve into the closed position.

6. An attachment for potato planting machines comprising in combination a rotary potato cutting apparatus and a plunger adapted to force a potato down upon said cutting apparatus, said plunger including a shaft, spring means for urging said shaft in an upward direction, driven means for moving the shaft in a downward direction and a plurality of diagonally disposed resilient members adapted to engage therebetween the upper end of said shaft to gradually decrease its upward movement on its release by said driven members.

'7. An attachment for potato planting machines comprising in combination a rotary potato cutting apparatus adapted to receive a number of whole potatoes to be separated into seed pieces, means for rotating said cutting apparatus, a plunger for forcing the seed pieces down upon the blade of the cutting apparatus, common driving means for said plunger and the rotating means for the cutting apparatus, said plunger and the rotating means for said cutting apparatus each having a foot for engagement with said drive, the latter including an eccentrically positioned member adapted to intermittently engage the foot of said cutting apparatus and the foot of the plunger.

8. An attachment for potato planting machines comprising in combination potato cutting means, a plunger having a shaft, a foot slidably mounted on the shaft, resilient means for urging said foot in a downward direction, means for actuating said plunger, said foot having resilient fingers for engagement with a potato carried by the cutting means, upon movement of said plunger, said foot being yieldable against the pressure of said resilient urging means during the cutting of said potato, said resilient urging means actuating said foot downwardly at the completion of the cutting to eject the potato pieces from the cutting means.

THOMAS E. WALKER. 

